Last updated: February 24, 2025
September in The Bronx brings a delightful transition from summer to fall, with maximum temperatures reaching a warm 32°C (91°F) and an average of 21°C (70°F). The month offers a refreshing contrast as nighttime lows dip to 10°C (49°F), providing a comfortable escape from daytime heat. Rainfall is moderate, totaling 91 mm (3.6 in) over approximately 10 days, contributing to the area's vibrant greenery. With an average humidity of 68%, the air feels pleasantly crisp, creating an inviting atmosphere for outdoor activities and exploration.
In September, temperatures in the Bronx begin to signal the transition from the sweltering summer to the cooler embrace of autumn. With minimums averaging around 10°C (49°F), the air carries a refreshing crispness, while daytime highs can reach a toasty 32°C (91°F). The overall average climbs to a pleasant 21°C (70°F), creating ideal conditions for outdoor activities and city explorations. As summer's warmth lingers, the days are still bright and inviting, yet the nights hint at the cooler months ahead, making September a unique blend of gentle warmth and the promise of fall.
In September, The Bronx experiences a moderate amount of rainfall, totaling 91 mm (3.6 in) over approximately 10 days. This marks a slight decline from the summer months, following July's peak of 142 mm and August's 124 mm. The transition into fall continues to bring more balanced weather patterns, with September's precipitation falling below both the annual average for the month and the preceding two months. However, the 10 days of rain offer a refreshing pause before the wetter months ahead, as October typically sees a rise in precipitation to 130 mm (5.1 in). The overall trend showcases how early autumn in The Bronx remains comfortably wet yet less intense compared to the summer deluges, setting the stage for the cooler days ahead.
In September, the humidity in The Bronx settles at a comfortable 68%, signaling the transition from summer to fall. This slight uptick from the drier summer months—where July and August recorded 62% and 65%—indicates a gradual reintroduction of moisture to the air as autumn approaches. The trend throughout the year showcases a peak in winter with around 84% humidity in January, tapering off during the warmer months and then gradually increasing again in the fall months. As the temperatures begin to cool, residents can expect a subtle increase in humidity, providing a refreshing balance before the chill of winter sets in.
In September, the UV Index in The Bronx remains high with a value of 8, categorized as very high, meaning that sun safety becomes increasingly crucial. As summer transitions to fall, the burn time shortens to just 15 minutes, suggesting that even brief exposure can lead to skin damage. This slight decrease from the peak summer months signals a need for continued vigilance. Throughout the year, the index demonstrates a clear trend: it peaks in the summer at levels 10, then gradually decreases into the fall and winter months, landing at a moderate 3 in January. For a deeper look at UV exposure and safety tips, visit The Bronx UV Index.
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As September rolls in, The Bronx basks in a delightfully warm glow, enjoying 274 hours of sunshine that gracefully bridges the gap between the sweltering summer and cozy fall months. This vibrant month follows the peak sunshine of July, which boasts a dazzling 341 hours, and remains significantly sunlit while marking a notable decline from the summer's height. With August still holding onto 314 hours, September serves as a reminder of summer’s gradual ebb, yet it maintains a generous amount of sunlight compared to the preceding months of the year. As the warmth lingers and the days begin to shorten, The Bronx showcases nature's beauty against a backdrop of rich fall colors, inviting residents and visitors alike to revel in the last vestiges of summer bliss.
As summer transitions to fall, September in The Bronx offers a respectable 45% chance of sunny weather. This figure reflects a slight improvement compared to the preceding months of August, which plummets to 29%, and June, where the sun shines only 39% of the time. Interestingly, while September's likelihood of sunshine is lower than the 50% average in January, it stands taller than the relatively gloomy April and May. This pattern suggests that as the warmth wanes, there's a refreshing balance to be found—providing an ideal backdrop for outdoor activities amidst the colorful onset of autumn.
As September rolls into The Bronx, daylight begins to wane, offering a gentle transition from the sun-drenched days of summer. With approximately 12 hours of daylight, the month signifies a subtle decline from the peak of 15 hours in June, gradually shifting towards the shorter days of fall and winter. This trend reflects a rhythmic dance between light and darkness, where the vibrant energy of summer gradually gives way to the softer, crisper days of autumn. The steady reduction in daylight hours invites residents to savor each moment of sunshine while preparing for the cozy, cooler months ahead.
As summer fades into fall, September in The Bronx ushers in a gentle breeze, with an average wind speed of 3.7 m/s (8 mph). This marks a subtle uptick from the languid summer months, where winds hovered around 3.0 m/s (7 mph) in both July and August. Contrasting with the cooler winter months, where speeds tend to be slightly higher, September’s winds signal a transition, balancing the summer's warmth with hints of autumn's crispness. The fall air invigorates the neighborhood, as the lush landscapes of summer start to don their autumn finery, creating a captivating blend of sights and sensations in the heart of the city.
The weather in The Bronx changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in The Bronx and find detailed weather information for every month.
In September, temperatures typically range from a mild 10°C (49°F) at night to a warm 32°C (91°F) during the day, with an average of 21°C (70°F). The month experiences around 91 mm (3.6 in) of precipitation over approximately 10 days, coupled with a humidity level of 68%. In contrast, January brings a chilling drop in temperatures, with a minimum of -17°C (2°F) and a maximum of 18°C (64°F), averaging just 1°C (35°F). Although precipitation is slightly lower at 72 mm (2.8 in) across 8 days, the humidity is significantly higher at 84%. This stark contrast in weather makes September feel decidedly warm and humid when compared to the frigid and dry conditions of January. For a deeper look into winter conditions, you can explore The Bronx weather in January.
September and February present stark contrasts in weather patterns. In September, temperatures range from a mild 10°C (49°F) at night to a warm average of 21°C (70°F), peaking at a hot 32°C (91°F). With 91 mm (3.6 in) of precipitation over approximately 10 days, humidity hovers around 68%, creating a comfortable yet slightly humid atmosphere. In contrast, February experiences much cooler temperatures, starting at a low of -15°C (5°F) and averaging just 2°C (37°F), with a maximum of 19°C (67°F). This month sees slightly higher precipitation at 106 mm (4.2 in) over about 11 days and significantly increased humidity at 82%, contributing to a brisk and chilly environment. For more detailed information, check The Bronx weather in February.
September and March present two distinctly different weather profiles. In September, temperatures range from a minimum of 10°C to a maximum of 32°C, making it a warm and pleasant month with an average of 21°C. In contrast, March sees much cooler temperatures, with a minimum of -9°C and a maximum of 24°C, resulting in a much chillier average of 5°C. Both months receive a similar amount of precipitation, around 90 mm, but March has higher humidity levels at 81% compared to September's 68%. For more detailed information, you can check The Bronx weather in March.
September typically offers warmer weather compared to April, with average temperatures ranging from a mild 21°C (70°F) to a maximum of 32°C (91°F). In contrast, April features cooler temperatures, with averages between -1°C (31°F) and 26°C (79°F). Although both months experience notable precipitation, September sees around 91 mm (3.6 in) over 10 days, while April has a slightly higher total of 115 mm (4.5 in) over 12 days. Additionally, humidity levels in April are a bit higher at 78%, compared to 68% in September. For a detailed look at the weather conditions during this month, visit The Bronx weather in April.
September and May present distinct contrasts in weather patterns. In September, temperatures range from a minimum of 10°C (49°F) to a maximum of 32°C (91°F), with an average temperature of 21°C (70°F). The month experiences around 91 mm (3.6 in) of precipitation over about 10 days, paired with a humidity level of 68%. In contrast, May features cooler temperatures, with a minimum of 2°C (37°F) and an average of 16°C (61°F), reaching a maximum of 30°C (86°F). The total precipitation in May is higher, at 117 mm (4.6 in) over approximately 13 days, while humidity slightly increases to 69%. For more detailed insight into May conditions, you can refer to The Bronx weather in May.
In September, temperatures range from a minimum of 10°C (49°F) to a maximum of 32°C (91°F), with an average of 21°C (70°F). The month experiences about 91 mm (3.6 in) of rainfall over roughly 10 days, resulting in a humidity level of 68%. In contrast, June sees slightly higher temperatures, with a minimum of 10°C (50°F) and a maximum of 34°C (93°F), alongside an average of 22°C (71°F). The precipitation is comparable, at 89 mm (3.5 in) over 11 days, and humidity is slightly higher at 69%. For more details on the weather during June, you can check The Bronx weather in June.
In comparing the weather between September and July, September presents a more moderate climate with temperatures ranging from a minimum of 10°C (49°F) to a maximum of 32°C (91°F), averaging 21°C (70°F). In contrast, July tends to be significantly warmer, with temperatures fluctuating between 16°C (61°F) and 36°C (96°F), averaging around 25°C (78°F). Additionally, while September experiences 91 mm (3.6 in) of precipitation over 10 days, July is wetter with 142 mm (5.6 in) of rain over 12 days. Humidity levels are slightly higher in September at 68%, compared to 62% in July. For more details on July's weather, you can check The Bronx weather in July.
The weather in September shows a notable shift compared to August, with temperatures dipping slightly from a minimum of 16°C (61°F) and an average of 24°C (76°F) in August to a minimum of 10°C (49°F) and an average of 21°C (70°F) in September. August experiences slightly warmer conditions, with a maximum of 33°C (92°F), while in September, the maximum is only 32°C (91°F). Additionally, September sees a reduction in precipitation, with 91 mm (3.6 in) over 10 days compared to August's 124 mm (4.9 in) over 13 days. Humidity levels remain relatively similar, with August at 65% and September at 68%. For more insights, you can check The Bronx weather in August.
In September, temperatures range from a milder minimum of 10°C (49°F) to an average of 21°C (70°F), with occasional peaks reaching up to 32°C (91°F). The month experiences an average precipitation of 91 mm (3.6 in) over about 10 days, with humidity at 68%. In contrast, October brings a noticeable drop in temperatures, with minimums falling to 4°C (39°F) and an average of 16°C (61°F), although the maximum can still reach 32°C (91°F) on warmer days. Precipitation increases to 130 mm (5.1 in) spread over 11 days, and humidity rises slightly to 74%. For more detailed insights, visit The Bronx weather in October.
September and November present contrasting weather patterns, reflecting the transition from summer to winter. In September, temperatures range from a mild 10°C (49°F) to a warm 32°C (91°F), with an average of 21°C (70°F), making it a delightful month. However, it also sees some precipitation, totaling 91 mm (3.6 in) over about 10 days, accompanied by a humidity level of 68%. On the other hand, November brings a significant drop in temperatures, with lows plummeting to -8°C (18°F) and an average of only 8°C (47°F). The maximum temperature reaches a comfortable 22°C (72°F) but is often cooler overall, with 90 mm (3.5 in) of precipitation spread over 9 days and a higher humidity of 82%. To learn more about the specifics of November's weather, visit The Bronx weather in November.
September and December exhibit striking differences in weather patterns. In September, temperatures generally range from a comfortable 10°C (49°F) at night to a warm 32°C (91°F) during the day, with an average of 21°C (70°F). However, the month experiences approximately 91 mm (3.6 in) of precipitation over about 10 days, combined with a humidity level of 68%. In contrast, December sees a significant drop in temperatures, with a minimum of -10°C (13°F), an average of 4°C (39°F), and a maximum of 17°C (64°F). This colder month also brings increased precipitation, totaling around 117 mm (4.6 in) over the same number of rain days, albeit with higher humidity at 80%. For a more detailed look at December’s climate, you can visit The Bronx weather in December.
As September unfolds in The Bronx, the atmosphere transforms from the sweltering heights of summer to a more pleasant and mild climate. While maximum temperatures can still peek at 32°C (91°F), the average settles into a comfortable 21°C (70°F), making outdoor activities more enjoyable. The month sees a notable increase in humidity, but it’s balanced by refreshing breezes. With an average of 10 days of precipitation, September marks a shift towards the wetter months, yet it still retains a hint of summer’s warmth. This transition sets the stage for the vibrant fall season. For a deeper understanding of seasonal patterns, visit The Bronx Climate.